Date: Fri, 17 May 2013 20:47:28 +0200 From: =?UTF-8?B?UmFkaW8gbcWCb2R5Y2ggYmFuZHl0w7N3?= <radiomlodychbandytow@o2.pl> To: Jilles Tjoelker <jilles@stack.nl> Cc: freebsd-threads@freebsd.org Subject: Re: Getting ENOMEM with pthread_mutex_init Message-ID: <51967B40.9060409@o2.pl> In-Reply-To: <20130515211851.GA29110@stack.nl> References: <5184F113.805@o2.pl> <20130515211851.GA29110@stack.nl>
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On 15/05/2013 23:18, Jilles Tjoelker wrote:
> On Sat, May 04, 2013 at 01:29:23PM +0200, Radio młodych bandytów wrote:
>> I'm having troubles that I seem unable to resolve.
>> My programs creates and destroys mutexes repeatably (and, obviously,
>> uses them in between). Around the 60th lock created, I always get ENOMEM.
>> I have free memory, lots of it. All locks get released properly.
>
>> The relevant pieces of code:
>
>> #define MUTEX pthread_mutex_t
>> inline MUTEX create_mutex()
>> {
>> MUTEX mutex;
>> int ret = pthread_mutex_init(&mutex, NULL);
>> if(ret != 0)
>> throw std::runtime_error("Failed to create a mutex");
>> return mutex;
>> }
>
>> inline void destroy_mutex(MUTEX *mutex)
>> {
>> int ret = pthread_mutex_destroy(mutex);
>> if(ret != 0)
>> throw std::runtime_error("Failed to destroy a mutex");
>> }
>
>> Scheduler::Scheduler(char* in,
>> char* out,
>> BlockInfo* metadata,
>> size_t isize,
>> size_t block_size,
>> size_t iters,
>> size_t min_work_size) :
>> in(in),
>> current_in(in),
>> out(out),
>> current_out(out),
>> metadata(metadata),
>> current_metadata(metadata),
>> size(isize),
>> size_left(isize),
>> block_size(block_size),
>> iters_left(iters)
>> {
>> lock = create_mutex();
>> work_size = (min_work_size / block_size) * block_size;
>> if (work_size < min_work_size)
>> work_size += block_size;
>> }
>> Scheduler::~Scheduler()
>> {
>> destroy_mutex(&lock);
>> }
>
>> Any suggestions?
>
> It is probably not the cause of your problem but using a copy of a
> pthread_mutex_t for synchronization is not allowed. pthread_mutex_init()
> should be called on the pthread_mutex_t that is part of the Scheduler.
>
Thanks for the suggestion. I just tried it and it didn't help though...
--
Twoje radio
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